Q.1. A quantity measured to be -30 m/s. Is it speed or velocity? Give a reason in your favour.
Asked by sbidipak
| 30th May, 2017,
04:04: PM
Expert Answer:
- The basic difference between Speed and Velocity is that the speed is a scalar quantity whereas velocity is a vector quantity.
- In simpler words, velocity is a speed with the direction and at the other hand, the speed has no element of direction of motion involved in its expression.
- Therefore, if the quantity is measured or expressed as '-30 m/s', then the negative symbol is an indicator of a motion which is opposite to the direction of the force applied.
- With the element of direction in its expression, it can be concluded that the above quantity is an expression velocity and not the speed.
- The basic difference between Speed and Velocity is that the speed is a scalar quantity whereas velocity is a vector quantity.
- In simpler words, velocity is a speed with the direction and at the other hand, the speed has no element of direction of motion involved in its expression.
- Therefore, if the quantity is measured or expressed as '-30 m/s', then the negative symbol is an indicator of a motion which is opposite to the direction of the force applied.
- With the element of direction in its expression, it can be concluded that the above quantity is an expression velocity and not the speed.
Answered by Abhijeet Mishra
| 30th May, 2017,
05:40: PM
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